Main IndexAuto Repair Home Search Posts SEARCH
Who's Online WHO'S
Log in LOG

Fuel pump problem 99 Chevy Tahoe 5.7

  Email This Post

New User

Sep 3, 2011, 4:12 PM

Post #1 of 4 (2298 views)
Fuel pump problem 99 Chevy Tahoe 5.7 Sign In

I had to replace the heads on my 5.7 99 Tahoe and after putting the engine back together the fuel pump will not turn on. The fuel pump worked fine before the repair and if I jump the relay the fuel pump will turn on. The fuel pressure is good with it turns on, I have checked all the ground wires and they all seem to be hooked up. I cant figure it out, any help?

New User

Sep 3, 2011, 4:33 PM

Post #2 of 4 (2282 views)
Re: Fuel pump problem 99 Chevy Tahoe 5.7 [In reply to] Sign In

I forgot to mention that I replaced the relay with a new one and it still wont start

Veteran / Moderator
Discretesignals profile image

Sep 3, 2011, 5:13 PM

Post #3 of 4 (2275 views)
Re: Fuel pump problem 99 Chevy Tahoe 5.7 [In reply to] Sign In

If you bypass the fuel pump relay and have the pump running, will the engine start?

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 3, 2011, 5:19 PM

Post #4 of 4 (2272 views)
Re: Fuel pump problem 99 Chevy Tahoe 5.7 [In reply to] Sign In

The PCM supplies trigger power to the relay on the Dk green with white wire. Check to see if you are getting that during the first 2 seconds of "key on" and once it starts cranking.
You should also check for spark when cranking


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.


  Email This Post

Latest Forum Post

1991 Dodge Dynasty 3.3L 110,000 The headlights blink when the high beams are o...

I have a 1992 ford ranger 3.0l v6 5 speed. today i ran out of gas and when i got...

I have a weird situation in that my run lights won't work on my utility trailer....

I have a 1997 Grand Caravan 3.3 Liter that does not shift into first, Once the c...

1999 GMC Sierra 1500 I was driving and the truck just killed. Got it home and ...

Hi Guys and Girls, My 02 Chevy Astro has not been able to start, some tips would...

Feed Button

Automotive Forum Categories
AC Auto Repair
Auto Body Repair
Auto Insurance
Automotive Repair
Automotive Wiring
Automotive World
Brake Systems
Car Care Tips
Car Racing
Car Shows and Events
Car Stereo Repair
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair
Gasoline and Motor Oils
General Discussions
Motor Vehicle Inspection
Motorcycle ATV Repairs
Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Repair
Motorcycle Seat Repair
Remote Control Cars
Steering and Suspension
The Bargin Bin
Traffic Ticket Help
Tricks of the Trade
Truck Repair
Truck Repair Advice
Truck Engine Repair
Truck Suspension Repair
Car Forum - Sitemap

Search for (options) Privacy